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Fillet Weld Throat Area Equations and Calculation

Weld Design Menu

Fillet Weld Throat Area Equations and Calculation, full length weld and Active Load bearing area.


Throat Area of Fillet Weld A [mm2, in2]
Full Weld Length Active Load-bearing Length



= Throat area of fillet weld [mm2, in2]


= Width of weld [mm, in]
s = Web thickness [mm, in]
L = Length of weld [mm, in] 
r = Weld radius [mm, in]
t = Flange thickness [mm, in]
H = Height of fillet weld [mm, in]
a = Fillet weld cross sectional area


a = Z2/2

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